2 * Copyright (C) Paul Mackerras 1997.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
20 /* Value picked to match that used by yaboot */
21 #define PROG_START 0x01400000 /* only used on 64-bit systems */
22 #define RAM_END (512<<20) /* Fixme: use OF */
23 #define ONE_MB 0x100000
27 static unsigned long claim_base;
29 void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
30 unsigned long r6, unsigned long r7);
32 static void *of_try_claim(unsigned long size)
34 unsigned long addr = 0;
37 claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
39 for(; claim_base < RAM_END; claim_base += ONE_MB) {
41 printf(" trying: 0x%08lx\n\r", claim_base);
43 addr = (unsigned long) of_claim(claim_base, size, 0);
44 if (addr != PROM_ERROR)
49 claim_base = PAGE_ALIGN(claim_base + size);
53 static void of_image_hdr(const void *hdr)
55 const Elf64_Ehdr *elf64 = hdr;
57 if (elf64->e_ident[EI_CLASS] == ELFCLASS64) {
59 * Maintain a "magic" minimum address. This keeps some older
60 * firmware platforms running.
62 if (claim_base < PROG_START)
63 claim_base = PROG_START;
67 static void of_platform_init(unsigned long a1, unsigned long a2, void *promptr)
69 platform_ops.image_hdr = of_image_hdr;
70 platform_ops.malloc = of_try_claim;
71 platform_ops.exit = of_exit;
72 platform_ops.vmlinux_alloc = of_vmlinux_alloc;
74 dt_ops.finddevice = of_finddevice;
75 dt_ops.getprop = of_getprop;
76 dt_ops.setprop = of_setprop;
81 loader_info.promptr = promptr;
82 if (a1 && a2 && a2 != 0xdeadbeef) {
83 loader_info.initrd_addr = a1;
84 loader_info.initrd_size = a2;
88 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
89 unsigned long r6, unsigned long r7)
91 /* Detect OF vs. ePAPR boot */
93 of_platform_init(r3, r4, (void *)r5);
95 epapr_platform_init(r3, r4, r5, r6, r7);